Adding extra insulation under the house
Hi, I have two questions about adding some extra insulation under my house. Our house has R-19 under the whole house. With 2×10 floor joist, there is still plenty of space for extra insulation. I have some unfaced R-19 left from my parents house. My first question is: Can I just add another layer of insulation right on top of the existing insulation? The second is: Would there be a problem with putting Tyvek on the floor joist to support the extra layer of insulation? Thanks for your help.
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